B0 field inhomogeneity estimation using internal phase maps from long single echo time MRI acquisition

US12135362B2 · kind B2 · utility

Assignees

• Siemens Healthineers AG · DE
• COMMISSARIAT A L'ENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVES · FR

Inventors

• Guillaume Daval-Frerot · Sainte-Geneviève-des-Bois, FR
• Aurelien Massire · Saint-Pierre-des-Corps, FR
• Mathilde Ripart · Seraincourt, FR
• Boris Mailhe · Plainsboro, US
• Mariappan S. Nadar · Plainsboro, US
• Alexandre Vignaud · Paris, FR
• Philippe Ciuciu · Saint-Michel-sur-Orge, FR

Key dates

• Filing date: Apr 30, 2021
• Grant date: Nov 5, 2024
• Expiry date: Jul 14, 2043

Classification

• Technology area (CPC G): Physics
• CPC primary: G01R33/56563
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A magnetic resonance (MR) image may be created from MR data by receiving the MR data, applying a transform to the MR data, where a result of the applying is an image space representation of the MR data, determining a wrapped phase map of the image space representation of the MR data, obtaining an unwrapped phase map based on the wrapped phase map, scaling the unwrapped phase map into a B0 field map, reconstructing the MR image based on the MR data, correcting the MR image based on the B0 field map, and outputting the MR image. The scaling may be free of accounting for effects on the MR data by artifact sources secondary to B0 field inhomogeneities.